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CN106253886A - 计算机保护电路 - Google Patents

计算机保护电路 Download PDF

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Publication number
CN106253886A
CN106253886A CN201610713864.7A CN201610713864A CN106253886A CN 106253886 A CN106253886 A CN 106253886A CN 201610713864 A CN201610713864 A CN 201610713864A CN 106253886 A CN106253886 A CN 106253886A
Authority
CN
China
Prior art keywords
threshold comparator
photoelectrical coupler
computer
input end
resistance
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610713864.7A
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English (en)
Inventor
龚湘潮
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Liuzhou Pengda Technology Co Ltd
Original Assignee
Liuzhou Pengda Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Liuzhou Pengda Technology Co Ltd filed Critical Liuzhou Pengda Technology Co Ltd
Priority to CN201610713864.7A priority Critical patent/CN106253886A/zh
Publication of CN106253886A publication Critical patent/CN106253886A/zh
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03KPULSE TECHNIQUE
    • H03K17/00Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03FAMPLIFIERS
    • H03F17/00Amplifiers using electroluminescent element or photocell

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manipulation Of Pulses (AREA)

Abstract

本发明公开了一种计算机保护电路,涉及计算机设备制造技术领域;有一光电耦合器,所述光电耦合器的初级与外部设备连接,所述光电耦合器的次级与阈值比较器的正输入端连接,所述阈值比较器的负输入端通过电阻与所述光电耦合器的次级连接,所述阈值比较器的负输入端还连接有调节电阻,在所述阈值比较器的负输入端与所述电阻的连线连接有电容,所述阈值比较器的输出端与计算机连接。本发明可以解决外部设备影响计算机正常运行的问题。

Description

计算机保护电路
技术领域
本发明涉及计算机设备制造技术领域,尤其是一种用于隔离计算机与外部设备的保护电路。
背景技术
一般的计算机与外部设备的连接没有保护,往往会使外部设备的电压或干扰源串入计算机内,从而影响计算机的正常运行。
发明内容
本发明的目的是提供一种计算机保护电路,它可以解决外部设备影响计算机正常运行的问题。
为了解决上述问题,本发明采用的技术方案是:这种计算机保护电路,有一光电耦合器,所述光电耦合器的初级与外部设备连接,所述光电耦合器的次级与阈值比较器的正输入端连接,所述阈值比较器的负输入端通过电阻与所述光电耦合器的次级连接,所述阈值比较器的负输入端还连接有调节电阻,在所述阈值比较器的负输入端与所述电阻的连线连接有电容,所述阈值比较器的输出端与计算机连接。
由于采用了上述技术方案,本发明与现有技术相比,具有的有益效果是:本发明采用光电耦合器作为计算机与外部设备的隔离器,使外部设备干扰源不会干扰计算机的正常运行。
附图说明
图1是本发明的原理示意图。
具体实施方式
下面结合附图和实施例对本发明作进一步详述:
图1所示的计算机保护电路,有一光电耦合器IC2,光电耦合器IC2的初级与外部设备连接,光电耦合器IC2的次级与阈值比较器IC1的正输入端连接,阈值比较器IC1的负输入端通过电阻R1与光电耦合器IC2的次级连接,阈值比较器IC1的负输入端还连接有调节电阻R2,在阈值比较器IC1的负输入端与电阻R1的连线连接有电容C1,电阻R1与 电容C1组成低通滤波器,阻止阈值比较器IC1的误触发,阈值比较器IC1的输出端与计算机连接,阈值比较器IC1的阈值电压由R2调节。当外部设备的输出为“0”态,作用于光电耦合器IC2初级,于是光电耦合器IC2的次级导通,使阈值比较器IC1输出“1”态;反之,阈值比较器IC1输出“0”态。

Claims (1)

1.一种计算机保护电路,其特征在于:有一光电耦合器(IC2),所述光电耦合器(IC2)的初级与外部设备连接,所述光电耦合器(IC2)的次级与阈值比较器(IC1)的正输入端连接,所述阈值比较器(IC1)的负输入端通过电阻(R1)与所述光电耦合器(IC2)的次级连接,所述阈值比较器(IC1)的负输入端还连接有调节电阻(R2),在所述阈值比较器(IC1)的负输入端与所述电阻(R1)的连线连接有电容(C1),所述阈值比较器(IC1)的输出端与计算机连接。
CN201610713864.7A 2016-08-24 2016-08-24 计算机保护电路 Pending CN106253886A (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610713864.7A CN106253886A (zh) 2016-08-24 2016-08-24 计算机保护电路

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610713864.7A CN106253886A (zh) 2016-08-24 2016-08-24 计算机保护电路

Publications (1)

Publication Number Publication Date
CN106253886A true CN106253886A (zh) 2016-12-21

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610713864.7A Pending CN106253886A (zh) 2016-08-24 2016-08-24 计算机保护电路

Country Status (1)

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CN (1) CN106253886A (zh)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5115148A (en) * 1989-11-02 1992-05-19 Siemens Aktiengesellschaft Interface between two electrical circuits operated at different operating voltages
CN203490693U (zh) * 2013-09-24 2014-03-19 成都爱信雅克科技有限公司 一种简易的计算机光电信号传输接口电路
CN203561685U (zh) * 2013-11-12 2014-04-23 成都麦客堂信息技术有限公司 计算机电源的电平检测器

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5115148A (en) * 1989-11-02 1992-05-19 Siemens Aktiengesellschaft Interface between two electrical circuits operated at different operating voltages
CN203490693U (zh) * 2013-09-24 2014-03-19 成都爱信雅克科技有限公司 一种简易的计算机光电信号传输接口电路
CN203561685U (zh) * 2013-11-12 2014-04-23 成都麦客堂信息技术有限公司 计算机电源的电平检测器

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
华仔: "计算机光电隔离接口电路图", 《HTTP://TECH.HQEW.COM/CIRCUIT_1408639》 *
张广川,万小松: "《电子电路集第六集》", 28 February 1991, 人民邮电出版社 *

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Application publication date: 20161221